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Yes, and that's the reason Bush appointed Roberts as Chief Justice, because all FISA court members appointed by Roberts gave a rubber stamp approval to any wire tapping and spying the Bush NSA wanted to do.
It makes you wonder why the Bush NSA often wire tapped and spied even without a FISA warrant, since their requests for warrants were always approved anyway. But it explains why the Obama NSA obtains warrants, because their requests are also get rubber stamp approval from a right-wing court that thinks like Roberts, Bush and Obama that the ends justifies any means and to hell with the fourth amendment.
The fourth amendment was written before the discovery of electricity, so it wasn't until the 20th century that the amendment was interpreted to address things like wire tapping. It's been interpreted in different ways since then, but in 2001 the Supreme Court ruled that warrantless use of electronic surveillance technology "that is not in general public use" is unconstitutional when it violates a reasonable expectation of privacy in ways that would previously have required a physical search.
To me, whether it is warrantless or with a warrant, that standard should be respected. The key words are that electronic surveillance is unconstitutional when it violates a reasonable expectation of privacy in ways that would previously have required a physical search -- since the fourth amendment provides "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized
Beyond that -- and even more important -- the FISA law and court system really ought to be repealed and amended so that FISA court members are nominated by a bipartisan congressional committee and approved by Congress, to at least attempt to ensure the court members are fair, impartial, and completely versed in Constitutional law.
As it is, the FISA law and system is a terrible travesty and mistake.